What is the OS of the KVM host? I believe vm uuids are type 4 uuids and are hence independent of time. http://docs.oracle.com/javase/6/docs/api/java/util/UUID.html
On 12/9/13 12:01 PM, "Bryan Whitehead" <dri...@megahappy.net> wrote: >I have 3 independent Cloudstack installs. One is 3.0.x and the others are >4.1.0. > >Using KVM (i'm only using KVM so I don't have anything else for >comparison), between 3.0.x and 4.1.0 I'm getting instances with UUID's >that >are the same. > >I get the UUID by running this on the console (CentOS): > >dmidecode -s system-uuid > >Here is example output from 1 host: >[root@fortress ~]# dmidecode -s system-uuid >C1260F04-F171-3136-85A7-F0B77699DA33 >[root@fortress ~]# ifconfig eth0 >eth0 Link encap:Ethernet HWaddr 06:9A:36:00:00:AF > inet addr:removed Bcast:70.33.251.255 Mask:255.255.255.0 > inet6 addr: fe80::49a:36ff:fe00:af/64 Scope:Link > UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 > RX packets:20586 errors:0 dropped:0 overruns:0 frame:0 > TX packets:1796 errors:0 dropped:0 overruns:0 carrier:0 > collisions:0 txqueuelen:1000 > RX bytes:1764556 (1.6 MiB) TX bytes:197329 (192.7 KiB) > > >here is another: >[root@db-sla01 ~]# dmidecode -s system-uuid >C1260F04-F171-3136-85A7-F0B77699DA33 >[root@db-sla01 ~]# ifconfig eth0 >eth0 Link encap:Ethernet HWaddr 06:5E:9A:00:00:C9 > inet addr:removed Bcast:64.13.168.255 Mask:255.255.255.0 > inet6 addr: fe80::45e:9aff:fe00:c9/64 Scope:Link > UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 > RX packets:7644414 errors:0 dropped:0 overruns:0 frame:0 > TX packets:3073765 errors:0 dropped:0 overruns:0 carrier:0 > collisions:0 txqueuelen:1000 > RX bytes:735505477 (701.4 MiB) TX bytes:519743789 (495.6 MiB) > >NOTE: The IP's are not in the same nor in the same subnet > >The time between creation is pretty long... weeks. > >Any ideas? > >I've just been killing VM's that have collisions with UUID's but it >happens >pretty often. > >-Bryan
